1st Alignment in more than 11 years!

I took it to Carl's Alignment and Brake here in Vancouver, WA yesterday and had a four-wheel done, first time since I've owned it at least.  (And I rebuilt the rear suspension many years ago!)  Charged me $125, but it feels really good, steering wheel is straight and I knew this was the right place to go through word of mouth and I always see muscle cars, hot rods, hot trucks, and, yes, Vette's getting work done there.  They ended up having to adjust shims at all four corners.  They showed me what they did and pointed out a few things for me to address - a really good experience overall.  

I'm sorry....WHAT? Your rear end is lazy?!?!?
"What th' heck d'ya mean ?"

Yeah, yeah, I knew that word wasn't right, but I don't know exactly how to describe it.  It just kind of sways in an up and down fashion, going over bumps.  Doesn't feel crisp like it should.  In engineer-ese, I'd say the damping rate isn't sufficient.  The spring is the regular 9 leaf, about 8 years old, but not many miles on it.  

Oh....so what ya really meant was yer rear end is floppy!
Your description sounds like the shocks are bad for sure, if it's just kinda floating when you hit a bump/dip or something.

While you're back there messing with your rear, consider dumping the heavy steel leaf spring and going with a composite spring.  The stock spring in my '73 weighed 36 lbs.

Joel, yes, "floats" is a good word, thanks!

Yes, taking weight off the rear hurts the balance a little.  The spring is relatively easy to replace, and just the thought of hauling that big lump of steel everywhere made it easy to get rid of it.  I like any kind of weight reduction :)

best thing I've done to the car was to put Bilsteins on it,drives soooo much better